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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd645fcb127f572d0943fd1bed08f0766eb1f1812a4563115f62da6a2cf357b74' 
  AND token = 'ubNPAoMLKc94hP5eFsL2uQ8ci5+kkvSMTeC4L35op8M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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