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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '395c5bc53e29ccfc0b6b838ebf028c06ec6dc906f9b70171284a74d85e0f0ecf' 
  AND token = '87Xc/X2PELdkGLqTOUvyk2j3Zgmt9O1C4aApdw3Dj3A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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