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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d4a29d4e8c1f1ecbac6e9fb66ea3fbd79430c8966c46bfc8c9a1a3ec86c8af8' 
  AND token = 'c13ugPNc5z9TALTKbLJli9VLZT7sbNz7Ml8F7mNdSc0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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