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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '61f8d0b0104e0a5d18071f0efe67b5731cbfe709d8820eb30f2e35744747f681' 
  AND token = 'gO0dQ7GfPo1117bryCPOpca8CwNWZekXXuLmp3Iwf+I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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