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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ebd1090fbc2aba2c69d747e605ac01bc572cc8d3687a25c9b95d26e4b3e4fb24' 
  AND token = 'qitYFmz7t5kSxUPRTu4VAVKaMi4YVeISHG6R1ey6qwc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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