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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aed3916412ae9aee8cbe411edbfc1d56349945c255db83b26dc4551941d17c2b' 
  AND token = 'Yv8/UgylmlnyAotFDkoTx+AoB62ga4e+ooGkBZiqr04=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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