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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0164ed2960262858534c774aacb07e50b7a6a06ce587f24f64e5167f05e276ce' 
  AND token = 'fi1uj1R1VZ04Jmr4ew3AhSNVwYv9f6SuuSnNQNS9J1w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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