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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b4bdf5cd77e1ce7d32b918d21d33304162126c2d37ca41885dbfe342ad38c6e' 
  AND token = 'lOa4BogwGoWzsaRerLTFV/WR2QZ+5U2p1FDh/mFbPfA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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