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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f9505b4e6876a91cc8a65ed18ad053daa90568c148bdab2bf5fad5944138d0b5' 
  AND token = 'RvcPhoy0pXsgsSrpxvjKeIKkH8GheldeQ/q+Ry1LEx4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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