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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4531f454efdb10d61f72d3d2b42ebd0ba6f19ebe4e7ff17ffb600ec883b2a748' 
  AND token = 'jJU1e3R7n6RmlwRQpvRXRr1xLDNgpWlcD+TSdJWwPWE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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