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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '736d3e6d4cc773d26be385c96204b434130890d64ef85e7c36d79fa19f52c3eb' 
  AND token = 'aL5qe8euzSttvFjH/63fy0pIf50HI5i330Fp0hwFclM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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