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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '94b0860ef56ef9c522afc80a01af6d8f5e023eda3aa1cd54735f96c2e20697bd' 
  AND token = 'bQzZlr3hU7gosCyHgiUn2j9y5oRLdPwa/9tsPa87qME=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}