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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'efc1ce132310dbacd30ffd607bcfd403e23f56a82c562b9b2a8ed373947137fc' 
  AND token = 'FoISIZek19K8bJgRfde4bt6RHhbxefXmcxo4wGoDJkQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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