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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2d0b988a082f3f0557c0e9d787207d1fde71ea5fc77617c3a84d909c5de1239e' 
  AND token = 'hfuDQjPHSTSZ3FJEf77Linbqlu/M09QbAAaN3C0H0/8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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