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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e20962089117c707247d356e452ea1eb78ceb25b3bfa44c64a55c6bbc129c86' 
  AND token = 'h5WGysfbP5S1ITk6Lm8IC0zko0TGrNGlMkqUTELPGsU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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